Demonstrates how to use
UICollectionView, a way to present ordered data to users in a grid-like fashion. With a collection view object, you are able to define the presentation and arrangement of embedded views. The collection view class works closely with an accompanying layout object to define the placement of individual data items. In this example
UIKit provides a standard flow-based layout object that you can use to implement multi-column grids containing items of a standard size.
This application also demonstrates the use of
Application State Restoration features introduced in iOS 7. If the application exits, it will restore the previous state the next time it starts.
(Note that if you quit the application from the
App Switcher, it will not restore state on the next launch, so for testing, exit the application from
To manipulate images, select one from the collection view, then you can do the following:
Single tap will
Zoom with two fingers resizes the image
Double tap alternates between zoom and normal size for the image
Sepia buttons on the bottom right present a filter controller to manipulate the image.
In this example, the following state is saved and restored:
- CollectionView scroll position.
- Selected cell in CollectionView.
- Displayed Image.
- CGAffineTransform for displayed image
- Visible/Hidden state of Navigation/Tool/StatusBar when image is showing
- Filter settings for image
Additionally, if the Mail Activity is selected, to compose Mail, that will be saved and restored.
Building this sample requires Xcode 5.0 and iOS 7.0 SDK
This sample runnable on iPhoneSimulator or iPhone
Xamarin port changes are released under the MIT license
Ported to Xamarin.iOS by Timothy Risi & Rustam Zaitov